Not sure what you mean by this? There's 3 bones in the elbow... Looks like a he dislocated it, there are quite a few ligaments, tendons and nerves of the elbow joint and potential for complications associated with it.It 'ain't. Mine swelled up to the size of an orange. It was described to me as a nest of overlaying delicate bones. In some cases, if I remember rightly, they can pin some bones. I did mine opening a beer fridge the wrong way... Difficult to explain in words, highly comic with a live demonstration though.
Lets hope there was minimal damage and a speedy recovery